Yuko Mizutani
Yuko Mizutani (水谷優子), real name Yuko Nishikubo (西久保優子), nicknamed "Kerorin" (ケロリン), born November 4, 1964, in Ama, Aichi, Japan, was a voice actress who played Ikuko Tsukino in the first three seasons of Sailor Moon Crystal. Some of her other anime roles included Sora Takenouchi in Digimon Adventure, Pinoko in Black Jack, Luchs in Saber Marionette, and Mihoshi Kuramitsu in Tenchi Muyo!.
She died on May 17, 2016, at the age of 51, after previously being diagnosed with breast cancer.